A review of different diffraction optical elements developed at BESSY for X-ray focusing is presented.Bragg-Fresnel optics as a basic element to design effective and high resolution X-ray focusing and dispersive X-ray optics is discussed.An experimental investigation of the combination of a long focal distance Bragg-Fresnel lens with a bimorph mirror is described.A reflection Fresnel zone plate has been tested as a focusing and dispersion optical element for X-ray Absorption Spectroscopy (XAS)on short-time pulse beamline.